Hupo, with all due respect you don't understand the doctrine of irresistible grace
You quoted these verses, as if they have anything to do with the doctrine, or as if they refute the doctrine
But irresistible grace
does not mean that men cannot or never do resist the grace of God. Since it doesn't mean that, it does no good to quote verses that say such a thing
What it means is that when God calls a man with salvific intentions, He is successful 100% of the time. Up until God does such a thing though, men will (consistently) resist God's grace their entire lives.
You and I both resisted God's grace up until the point when God regenerated our hearts and minds, removed the blindfold, gave us vision, turned our unwillingness around into willingness (if left to ourselves we would have or could have never done such a thing)
I realize this is straying from the topic at hand, but this is such an important doctrine I felt that it needed some direct attention.
To reiterate my argument, when a Christian realizes that no amount of persuading or arguing or talking with a lost loved one is going to make them see Christ's beauty, his last resort is to ask God to change the man's heart.
The only reason we'd pray such a thing
is if we actually expected God to do that.